<template>
  <div class="my-counter">
    <button
      type="button"
      class="btn btn-light"
      :disabled="item.goods_count===1"
      @click="item.goods_count--"
    >-</button>
    <!-- 注意这里需要收集到数字 .number -->
    <input
      type="number"
      class="form-control inp"
      v-model.number="item.goods_count"
    >
    <button
      type="button"
      class="btn btn-light"
      @click="item.goods_count++"
    >+</button>
  </div>
</template>

<script>
export default {
  props: {
    item: Object,
  },
  // 监听 item 的变化
  watch: {
    item: {
      deep: true,
      handler() {
        // 如果数量小于 1, 直接设置成 1 即可
        if (this.item.goods_count < 1) {
          this.item.goods_count = 1;
        }
      },
    },
  },
};
</script>

<style lang="less" scoped>
.my-counter {
  display: flex;
  .inp {
    width: 45px;
    text-align: center;
    margin: 0 10px;
  }
  .btn,
  .inp {
    transform: scale(0.9);
  }
}
</style>